Fig. 2.—

Bayesian phylogeny of amino acid transporters in the APC family. Branches are color coded by taxon, as indicated in the key. Node support is shown both as branch weight (Bayesian posterior probability) and circles on nodes (ML bootstrap support). The slimfast expansion is marked in the upper right, along with the four subclades resulting from duplication events that predate aphid/phylloxera divergence. Duplication events occurring at different time scales in aphid evolution gave rise to lineage-specific clades highlighted by gray boxes. Letters in gray boxes refer to (A) clades resulting from duplication events predating Aphididae divergence, (B) clades resulting from duplication events predating Aphidinae divergence, (C) clades resulting from duplication events predating Macrosiphini divergence, and (D) species-specific duplication events.